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I posted this at 350zmotoring but just wanted to share it with you guys.



OK, first off i have a brand new 2004.5 Z. Buid date 6/04 and it has 1500 miles on it, no mods.

So i was driving down the street last night and this toyota camry pulls up next to me with 2 guys and 2 girls in the back (they were cute). So this guys starts revving his engine on me HAHAHAH. WEll i let him take off on me just to make sure he was serious. He was, so i gunned it and caught up. I stayed next to the toyota and shook my finger "no no" to the guys in the front then blew a kiss to the girls in the back, and blew right past them.



OK HERE IS THE PROBLEM. After that i was cruising down the street and I come to a stop. The light turns green and i put it in first, right when i get to 2500 RPM the car starts to lurch foward and the car sounds like its choking?????? so i switch to second, alright its fine if i keep it under 2500k but once i go after that it starts to choke again. Felt almost like fuel cut or something I dunno. When i revved the engine the exhaust sounded like a popping noise?

So i take it to a gas station and let it idle for 1 minute. The idle is SUPER ROUGH and it keeps spiking from 800-1500 rpm, and the oil pressure is near 60psi. WTF. So i turn off the car and check under the hood. I checked the oil (GOOD) I check the Air Filter (good) NOTHING WRONG???? SO i think to myself, maybe its the ECU. Maybe Billl Gates designed the OS or something for the ECU and i just need to do a windows reboot.

So i get back into the car and start up the engine. CHA CHing.... Perfect the idle is around 500 oil pressure around 18-20 and I rev. her up just to make sure she doesnt choke after 2500 rpm and she purrs like a cat, smooth as butter??????????????????????????????????????????????


She was fine the rest of the night, but if that doesnt convince you to buy an extended warranty I dunno what will.

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It almost sounded like one of the cylinders wasn't firing, or it was getting flooded. If the spark is computer controlled or if the computer, for some reason, sent too much fuel into the mix, I could see that result being viable.

Then when you turn off the car and started it back up, it reset the ECU and it went back to normal.

Just a thought.
 

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As I was reading your post, I was thinking of the O2 sensors or an injector, but that seems pretty farfetched for a new car.

Your best bet is to take it in and have Nissan hook the Z up to a diagnostic computer and track down the problem. I had my SEL pop up, and they tracked it down to an aftermarket filter on the intake tube that no one knew about except for the original owner.
 

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Originally posted by SmoothZ@Oct 16 2004, 01:43 PM
As I was reading your post, I was thinking of the O2 sensors or an injector, but that seems pretty farfetched for a new car.

Your best bet is to take it in and have Nissan hook the Z up to a diagnostic computer and track down the problem.  I had my SEL pop up, and they tracked it down to an aftermarket filter on the intake tube that no one knew about except for the original owner.

O2 Sensor not so far fetched.... I went through similar problem. Dealer could'nt figure out for three months. first visit, new computer. next, wiring harness. Next, throttle body. Just about to have arbitration hearing when Nissan North America sent specialist from CA. He found the Oxygen sensor harness had somehow come disconnected. Plugged it in, and have had no problems ever since...... Good diagnosis...Even if that's not the problem....Dave
 
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